// Manipulate string
#include <string>
#include <iostream>

using namespace std;

int main(){
	string s1, s2;
	string s3 = "Hello World.";
	string s4("I am"); //initialized a string object.
	s2 = "Today";
	s1 = s3 + " " + s4;
	s1 += " 8 ";
	cout << s1 + s2 + "!" << endl;
}///:~